| Abstract
| - In this paper, we have demonstrated that P-type dehydrated nanotube titanic acid (DNTA) can significantlyenhance hole injection and transport in holes-only transport devices. In the low field region, the dominantconduction mechanism is injection limited. This gradually transitions to space charge limited current viatrapped charge limited current with increasing applied voltages. Through fabricated and characterized organiclight-emitting diodes (OLEDs) and by using a DNTA−poly(vinylcarbazole) (PVK) nanocomposite as thehole transport layer, we found that the performance of these devices was greatly improved with a higherluminance, an enhanced efficiency, and a lower turn-on voltage.
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